Craig Mayer, Nick WIlliams, Vojtech Huser
Lister Hill National Center for Biomedical Communications, National Library of Medicine, NIH, Bethesda, MD

See the full regCTG repository at https://github.com/lhncbc/CRI/tree/master/regCTG

To return to the list of conditions and view other reports go to https://lhncbc.github.io/CRI/regCTG/regCTG-condition_report_links.html


Study Counts

Type Study_count
Total_Studies 1904
interventional 1537
Observational 349
Registry 18

Studies over Time

```

Interventional Trials

Intervention Type

intervention_type Study_Count
Drug 460
Device 303
Drug|placebo 169
Behavioral 147
Other 139
Procedure 37
Biological 36
Device|Other 36
Device|Drug 29
Dietary Supplement 28
Drug|Other 22
Biological|placebo 17
Behavioral|Other 11
Drug|Procedure 11
Biological|Drug 8
Dietary Supplement|placebo 8
Combination Product 7
Device|Drug|Other 7
Behavioral|Device 6
Biological|Procedure 6
Diagnostic Test 6
Device|placebo 4
Device|Procedure 3
Dietary Supplement|Other 3
Other|placebo 3
Behavioral|Drug 2
Biological|Drug|placebo 2
Biological|Drug|Procedure 2
Combination Product|Device 2
Dietary Supplement|Drug|Other 2
Drug|Other|placebo 2
Other|Procedure 2
Radiation 2
Behavioral|Device|Drug 1
Behavioral|Device|Other 1
Behavioral|Device|Procedure 1
Biological|Device|Drug|Radiation 1
Biological|Dietary Supplement 1
Biological|Dietary Supplement|Other 1
Biological|Dietary Supplement|placebo 1
Biological|Drug|Other|placebo 1
Biological|Other 1
Device|Dietary Supplement 1
Dietary Supplement|Drug 1
Dietary Supplement|Drug|Other|placebo 1
Dietary Supplement|Drug|placebo 1
Drug|Genetic|Other 1
Genetic 1

Count of Studies by Intervention (normalized and mapped)

Interventions over Time

Weekly studies for each intervention

Studies by Country

Country Study_Count
United States 587
Germany 116
Canada 84
France 66
United Kingdom 62
NA 59
Denmark 55
Sweden 35
Austria 30
Israel 29
China 25
United States|Canada 22
Italy 21
Japan 20
Netherlands 18
Spain 16
Switzerland 16
Belgium 11
Brazil 11
Norway 9
Russian Federation 8
Poland 7
Australia 6
Egypt 6
Finland 6
United States|Israel 6
Slovenia 5
Argentina 3
Austria|Germany|United Kingdom 3
France|Switzerland 3
Greece 3
Israel|Slovenia 3
Korea, Republic of 3
Luxembourg 3
United States|United Kingdom 3
Austria|Czechia|Germany|Hungary|Netherlands|Poland|Portugal|Spain|United Kingdom 2
Austria|Germany|Luxembourg|United Kingdom 2
Austria|United Kingdom 2
Bulgaria|Czech Republic|Denmark|Finland|France|Hungary|Macedonia, The Former Yugoslav Republic of|Poland|Russian Federation|Turkey|United Kingdom 2
Czechia 2
Germany|Israel|Slovenia 2
Germany|United Kingdom 2
Jordan 2
New Zealand 2
Norway|Sweden 2
Pakistan 2
Saudi Arabia 2
United States|Australia 2
United States|Australia|Canada|Finland|Italy|United Kingdom 2
United States|Australia|Canada|Italy 2
United States|Austria|Canada|Germany 2
United States|France|Israel|Italy 2
United States|Germany 2
United States|Germany|Israel|Slovenia 2
United States|Mexico 2
United States|Puerto Rico 2
Algeria|Argentina|Brazil|Colombia|Kuwait|Mexico|Saudi Arabia|South Africa|Tunisia 1
Argentina|Australia|Austria|Brazil|Canada|Croatia|Denmark|Finland|France|Ireland|Israel|Norway|Poland|Russian Federation|South Africa|Spain|United Kingdom 1
Argentina|Australia|Austria|Brazil|Canada|Croatia|Denmark|Greece|Ireland|Israel|Italy|Russian Federation|Serbia|Spain|United Kingdom 1
Argentina|Australia|Bulgaria|Croatia|India|Macedonia, The Former Yugoslav Republic of|Malaysia|Romania|South Africa|Turkey 1
Argentina|Austria|Bulgaria|Canada|Croatia|Denmark|Finland|France|Germany|Greece|Ireland|Israel|Netherlands|Norway|Poland|Russian Federation|Spain|United Kingdom 1
Argentina|Brazil|Finland|India|Italy|Japan|Macedonia, The Former Yugoslav Republic of|United Kingdom 1
Argentina|China|Mexico 1
Argentina|Croatia|Czech Republic|Denmark|Finland|France|Greece|Italy|Macedonia, The Former Yugoslav Republic of|Norway|Poland|Romania|Russian Federation|Slovakia|Sweden 1
Australia|Belgium|Denmark|Finland|France|Ireland|Netherlands|Norway|Sweden|United Kingdom 1
Australia|Canada 1
Australia|Canada|Denmark|Netherlands|United Kingdom 1
Australia|Croatia|Denmark|Italy|South Africa|Sweden 1
Australia|Hong Kong|Malaysia|Philippines 1
Australia|New Zealand 1
Austria|Belgium|Bulgaria|France|Germany|Hungary|Israel|Italy|Lithuania|Netherlands|Poland|Romania|Slovakia|Spain|Sweden|Switzerland|United Kingdom 1
Austria|Czech Republic|Finland|France|Germany|Greece|Israel|Italy|South Africa|Spain|United Kingdom 1
Austria|Denmark|Finland|Germany|Norway|Sweden|Switzerland|United Kingdom 1
Austria|Denmark|Italy|Luxembourg|Netherlands|Slovenia|Spain 1
Austria|Germany 1
Austria|Germany|Ireland|Switzerland|United Kingdom 1
Austria|Germany|Italy|Netherlands|United Kingdom 1
Austria|Germany|Poland|United Kingdom 1
Austria|Germany|South Africa 1
Austria|Israel 1
Austria|Switzerland|United Kingdom 1
Bahamas 1
Bahrain|Kuwait|Qatar|United Arab Emirates 1
Belarus 1
Belgium|Croatia|Denmark|Finland|France|Germany|Ireland|Israel|Macedonia, The Former Yugoslav Republic of|Netherlands|Norway|Slovenia|Spain|Sweden|Switzerland|United Kingdom 1
Belgium|Denmark|France|Germany|Lithuania|Sweden|United Kingdom 1
Belgium|France 1
Belgium|France|Germany|Netherlands|Sweden|Switzerland 1
Belgium|France|Ireland|Netherlands|United Kingdom 1
Belgium|France|Luxembourg 1
Belgium|France|Netherlands|Sweden 1
Belgium|Germany 1
Belgium|Germany|Italy 1
Belgium|Germany|Poland|Sweden|United Kingdom 1
Belgium|United States|Austria|Bulgaria|Canada|Denmark|Finland|France|Italy|Netherlands|South Africa|Spain|Sweden 1
Canada|Czech Republic|Finland|France|Germany|South Africa|Spain|United Kingdom 1
Canada|Germany 1
China|Spain 1
Colombia 1
Croatia|Czech Republic|Israel|Russian Federation|Slovenia 1
Czech Republic|France|Italy 1
Czech Republic|Germany|Hungary|Italy|Poland 1
Czechia|Netherlands|Spain|Sweden 1
Denmark|Finland 1
Denmark|Germany|Italy|Netherlands|Poland|Spain|Switzerland 1
Denmark|Netherlands 1
Former Serbia and Montenegro|Germany|Macedonia, The Former Yugoslav Republic of|Russian Federation|South Africa 1
France|Belgium 1
France|Germany|Hungary 1
France|Germany|Israel|Italy|Slovenia|Sweden|United Kingdom 1
France|Germany|Italy|Spain|United Kingdom 1
France|Germany|United Kingdom 1
France|Italy|Netherlands 1
France|Italy|Netherlands|United Kingdom 1
Germany|Austria|Netherlands|Spain|Sweden 1
Germany|Italy 1
India 1
Iran, Islamic Republic of 1
Ireland 1
Israel|Slovenia|Sweden 1
Italy|Switzerland 1
Japan|Taiwan 1
Kazakhstan 1
Lithuania|Belgium|Denmark|France|Germany|Sweden|United Kingdom 1
Mexico 1
Netherlands|Spain 1
Poland|United States|Argentina|Australia|Belgium|Bulgaria|Canada|Colombia|Czechia|France|Germany|Hungary|Israel|Italy|New Zealand|Slovakia|South Africa|Spain|United Kingdom 1
Poland|United States|Australia|Denmark|France|Israel|Puerto Rico|Romania|Russian Federation|United Kingdom 1
Poland|United States|Belgium|Denmark|Finland|Germany|Norway|Sweden 1
Poland|United States|Czechia|Germany|Hungary|Spain 1
Portugal 1
Qatar 1
Rwanda 1
South Africa 1
Taiwan 1
Taiwan|United States|Austria|Bulgaria|Canada|Germany|India|Israel|Italy|Japan|Puerto Rico|Russian Federation|Serbia 1
Turkey 1
Ukraine 1
United States|Argentina|Australia|Austria|Brazil|Germany|Greece|India|Italy|Japan|Mexico|New Zealand|Poland|Puerto Rico|Romania|Russian Federation|Slovakia|Spain|Sweden|Taiwan 1
United States|Argentina|Australia|Belgium|Canada|Finland|France|Germany|Ireland|Israel|Netherlands|Norway|Poland|Russian Federation|Sweden|Ukraine|United Kingdom 1
United States|Argentina|Australia|Brazil|Greece|Hungary|Mexico|Romania|Russian Federation 1
United States|Argentina|Belgium|Canada|Chile|Germany|Japan|Netherlands|Poland|Russian Federation|Sweden|Switzerland|United Kingdom 1
United States|Argentina|Belgium|France|Germany|India|Italy|Mexico|Puerto Rico 1
United States|Argentina|Brazil|Bulgaria|Canada|Chile|Czechia|Denmark|France|Germany|Hungary|Israel|Italy|Japan|Latvia|Mexico|North Macedonia|Poland|Romania|Russian Federation|Serbia|Spain|Sweden|United Kingdom 1
United States|Australia|Austria|Belgium|Canada|Czechia|Denmark|Finland|France|Germany|Netherlands|Norway|Poland|Spain|Sweden|Taiwan|United Kingdom 1
United States|Australia|Austria|Belgium|Canada|Denmark|Finland|France|Germany|Hungary|Israel|Italy|Mexico|Romania|Spain|Sweden|United Kingdom 1
United States|Australia|Austria|Canada|France|Germany|Hungary|Israel|Italy|Puerto Rico|Spain 1
United States|Australia|Austria|France|Hungary|Israel|Italy|Korea, Republic of|Netherlands|Spain|Sweden|United Kingdom 1
United States|Australia|Belgium|Denmark|Estonia|Germany|Hungary|Israel|Spain 1
United States|Australia|Canada|Czechia|Finland|France|Germany|Greece|Hungary|Ireland|Italy|Latvia|Mexico|Netherlands|New Zealand|Norway|Poland|Portugal|Romania|Russian Federation|South Africa|Spain|Sweden|United Kingdom 1
United States|Australia|Canada|Italy|Sweden|United Kingdom 1
United States|Australia|Germany|Norway|Sweden 1
United States|Austria|Belarus|Canada|Czech Republic|Finland|Germany|Hungary|Israel|Italy|Lithuania|Poland|Russian Federation|Spain 1
United States|Austria|Belgium|Canada|Denmark|Finland|Ireland|Israel|Italy|Norway|Poland|Portugal|Russian Federation|Serbia|Spain|Sweden|Ukraine|United Kingdom 1
United States|Austria|Brazil|Chile|Czech Republic|Germany|Hungary|India|Mexico|Peru|Poland|Romania|Russian Federation|South Africa|Spain|Turkey 1
United States|Austria|Brazil|China|Czechia|Denmark|France|Germany|Israel|Italy|Japan|Mexico|Poland|Puerto Rico|Russian Federation|Spain|Ukraine|United Kingdom 1
United States|Austria|Canada 1
United States|Austria|France|Germany|Italy|Japan|Mexico|Poland|Russian Federation 1
United States|Belgium 1
United States|Belgium|Brazil|Canada|Croatia|Czechia|India|Israel|North Macedonia|Poland|Russian Federation|Serbia|Slovenia|South Africa|Spain 1
United States|Belgium|Canada|Croatia|Hungary|India 1
United States|Belgium|Canada|Czechia|Finland|Germany|Hungary|Poland|United Kingdom 1
United States|Belgium|Canada|France|Germany|Netherlands|Russian Federation|Slovenia|United Kingdom 1
United States|Belgium|Czech Republic|Finland|France|Germany|India|Israel|Italy|Mexico|Netherlands|Poland|Romania|Spain|Ukraine|United Kingdom 1
United States|Belgium|Germany|Greece|Hungary|Japan|Mexico|Poland|Romania 1
United States|Belgium|Germany|Greece|Norway|Poland|United Kingdom 1
United States|Brazil|Australia|Belgium|Canada|Croatia|Denmark|France|Greece|Ireland|Israel|Lithuania|Netherlands|New Zealand|Poland|Slovakia|South Africa|Spain|Sweden|United Kingdom 1
United States|Brazil|Russian Federation|Ukraine 1
United States|Bulgaria|Czechia|Estonia|Finland|Germany|India|Israel|Italy|Japan|Latvia|Lithuania|Poland|Puerto Rico|Russian Federation|Serbia|Turkey|Ukraine 1
United States|Bulgaria|Finland|France|Germany|Italy|Japan|Netherlands|North Macedonia|Russian Federation|South Africa|United Kingdom 1
United States|Canada|Croatia|Finland|India|Lithuania|Netherlands|United Kingdom 1
United States|Canada|Czech Republic|Denmark|Estonia|Finland|Hungary|Japan|Latvia|Netherlands|Puerto Rico|Romania|Sweden 1
United States|Canada|Czech Republic|Estonia|Germany|India|Israel|Latvia|Mexico|Netherlands|Poland|Romania|Spain|Sweden|Ukraine|United Kingdom 1
United States|Canada|Czech Republic|Poland|Russian Federation|Spain|Ukraine|United Kingdom 1
United States|Canada|Czechia|Estonia|Germany|Hungary|Latvia|Romania|Slovakia|South Africa|United Kingdom 1
United States|Canada|Czechia|Germany|Hungary|Poland|United Kingdom 1
United States|Canada|Denmark|Finland|Germany|Italy|Spain|Sweden|United Kingdom 1
United States|Canada|France|Germany|Italy|Spain|Sweden|United Kingdom 1
United States|Canada|Germany 1
United States|Canada|Germany|Italy|Switzerland 1
United States|Czechia|Italy|Sweden|United Kingdom 1
United States|Finland|France|Germany|Netherlands|Sweden|United Kingdom 1
United States|Finland|Germany|Hungary|Japan|Poland|Russian Federation 1
United States|Finland|Sweden 1
United States|France|Germany|Hungary|Japan|Poland|Russian Federation|Spain 1
United States|France|Germany|Russian Federation|South Africa|United Kingdom 1
United States|France|Italy|Netherlands 1
United States|Hungary 1
United States|Poland|Puerto Rico 1
United States|Puerto Rico|Slovakia|Spain|United Kingdom 1
United States|Spain 1

Sites per Study

Site_count Study_Count
1 1046
2 117
3 58
4 25
5 24
6 20
7 28
8 19
9 9
10 10
11 12
12 4
13 5
14 6
15 13
16 5
17 9
18 9
19 6
20 3
21 3
22 2
23 2
24 3
25 4
28 3
29 3
30 2
31 1
32 2
33 5
34 3
35 2
36 2
37 3
38 1
39 3
40 3
42 1
43 2
45 1
46 1
48 1
51 1
52 3
53 1
61 2
65 1
69 1
70 1
73 1
75 3
76 1
77 1
80 1
81 3
82 2
83 1
85 1
89 1
90 1
91 1
92 1
93 1
95 1
96 1
99 1
100 2
107 1
108 1
109 1
115 1
116 1
118 1
119 1
120 1
131 2
135 1
137 1
147 1
152 1
155 1
158 1
162 1
172 1
176 1
182 1
189 1
191 1

Phase

Phase Study_Count
N/A 675
Phase 1 215
Phase 2 215
Phase 3 186
Phase 4 119
Phase 1/Phase 2 73
Phase 2/Phase 3 28
Early Phase 1 26

Number of Arms

Number_of_Arms Count_of_Studies
1 301
2 818
3 172
4 75
5 15
6 21
7 1
8 2
9 2
10 1
11 1
14 1
18 1
NA 126

Number of Updates

Count of Versions Count of Studies
1 128
2 208
3 216
4 186
5 174
6 137
7 97
8 74
9 55
10 29
11 32
12 21
13 27
14 15
15 16
16 19
17 15
18 8
19 11
20 8
21 2
22 5
23 5
24 3
25 4
26 6
27 1
28 2
29 4
30 1
31 1
35 1
36 2
37 1
40 2
41 4
42 4
49 1
52 1
58 1
62 1
63 1
65 1
67 1
72 1
78 1
79 1
88 1
93 1
120 1

Update History Change Type

Change Type Count_of_Changes Count_of_Studies ratio
Study Status 8860 1409 6.288148
Contacts/Locations 4229 1211 3.492155
Recruitment Status 2283 1212 1.883663
Study Design 1582 1080 1.464815
None (earliest Version on record) 1537 1537 1.000000
Outcome Measures 1110 686 1.618076
Arms 906 612 1.480392
Interventions 906 612 1.480392
Sponsor/Collaborators 863 570 1.514035
Study Description 846 523 1.617591
Eligibility 795 526 1.511407
Study Identification 708 475 1.490526
Oversight 571 495 1.153535
References 426 288 1.479167
Conditions 319 237 1.345992
More Information 280 159 1.761006
Results 270 270 1.000000
IPDSharing 171 157 1.089172
Results Submission Events 118 118 1.000000
Baseline Characteristics 95 84 1.130952
Documents 84 82 1.024390
Reported Adverse Events 70 70 1.000000
Participant Flow 68 63 1.079365
2020 Study Status 3 3 1.000000
2020 Outcome Measures 2 2 1.000000
2020 Baseline Characteristics 1 1 1.000000
2020Recruitment Status 1 1 1.000000
Quality Control Review has not concludedReturned: April 15 1 1 1.000000
Quality Control Review has not concludedReturned: April 8 1 1 1.000000
Quality Control Review has not concludedReturned: February 25 1 1 1.000000
Quality Control Review has not concludedReturned: March 13 1 1 1.000000
Quality Control Review has not concludedReturned: May 1 1 1 1.000000
Quality Control Review has not concludedReturned: May 14 1 1 1.000000
Quality Control Review has not concludedReturned: May 6 1 1 1.000000

Enrollment Metrics by Phase

Measure Early.Phase.1 N.A Phase.1 Phase.1.Phase.2 Phase.2 Phase.2.Phase.3 Phase.3 Phase.4
Min. 5.00000 2.00000 1.00000 4.00000 2.00000 6.0 2.0000 8.000
1st Qu. 13.00000 20.00000 20.00000 10.00000 16.00000 27.5 60.0000 21.500
Median 22.00000 40.00000 30.00000 24.00000 36.00000 54.0 200.0000 45.000
Mean 33.26923 78.50744 37.85047 29.45205 65.04739 84.0 310.2595 111.563
3rd Qu. 47.00000 90.00000 43.75000 41.00000 77.50000 70.5 462.0000 100.000
Max. 126.00000 1500.00000 315.00000 115.00000 1040.00000 554.0 2287.0000 2346.000

Trial Group Type

group_type Group_Count
Experimental 1668
Active Comparator 772
Placebo Comparator 265
Other 167
No Intervention 165
NA 126
Sham Comparator 11

Intervention Model

intervention_model Study_Count
Parallel Assignment 637
Crossover Assignment 496
Single Group Assignment 354
Factorial Assignment 24
Sequential Assignment 17
NA 9

Primary Purpose

primary_purpose Study_Count
Treatment 1033
Basic Science 103
Supportive Care 90
Other 84
Prevention 81
Diagnostic 47
NA 46
Health Services Research 32
Device Feasibility 16
Screening 4
Educational/Counseling/Training 1

Observational Studies

Studies by Country

Country Study_Count
United States 117
NA 21
Canada 18
France 17
Denmark 13
Italy 9
Netherlands 8
Germany 7
Korea, Republic of 7
United Kingdom 7
Japan 6
Turkey 6
Austria 5
Belgium 5
India 5
Philippines 5
Sweden 5
China 4
Greece 4
Indonesia 4
Israel 4
Spain 4
Switzerland 4
Brazil 3
Slovakia 3
Slovenia 3
Taiwan 3
United States|United Kingdom 3
Macedonia, The Former Yugoslav Republic of 2
Poland 2
Romania 2
Russian Federation 2
Saudi Arabia 2
United States|Canada 2
Algeria 1
Argentina|Austria|Bulgaria|Canada|Croatia|Czechia|Denmark|Finland|Germany|Hungary|India|Israel|Lebanon|Malaysia|Mexico|Netherlands|Poland|Romania|Russian Federation|Saudi Arabia|Serbia|Slovakia|Slovenia|Sweden 1
Australia 1
Austria|Denmark|Germany|Greece|Italy|Switzerland 1
Bangladesh 1
Bangladesh|Colombia|Egypt|Philippines|Singapore|South Africa|Turkey|United Arab Emirates 1
Belgium|Czech Republic|Denmark|Finland|France|Greece|Ireland|Israel|Italy|Korea, Republic of|Sweden|Turkey|United Kingdom 1
Bosnia and Herzegovina 1
Canada|Finland|Israel|Sweden 1
China|India|Malaysia|Sri Lanka|Vietnam 1
Croatia 1
Croatia|Finland|France|Germany|Greece|Ireland|Israel|Italy|Malaysia|Netherlands|Norway|Poland|Portugal|Romania|Spain|United Kingdom 1
Denmark|Germany 1
Denmark|Germany|Italy|Netherlands|Spain|Sweden|Switzerland|United Kingdom 1
Egypt 1
Finland 1
Former Serbia and Montenegro 1
France|Austria|Belgium|Denmark|Hungary|Israel|Italy|Lithuania|Poland|Serbia|Slovakia|Slovenia|Spain|Sweden 1
Ireland|United Kingdom 1
Malaysia 1
Mexico 1
Morocco 1
Netherlands|Slovenia 1
Netherlands|Sweden 1
Netherlands|United Kingdom 1
Pakistan 1
Portugal|Saudi Arabia|United Arab Emirates 1
Qatar 1
Singapore 1
Thailand 1
Tunisia 1
United Arab Emirates 1
United States|Algeria|Canada|China|Denmark|France|Germany|India|Italy|Japan|Mexico|Netherlands|Poland|Russian Federation|Spain|Turkey|United Kingdom 1
United States|Australia|Canada|Finland|Italy|United Kingdom 1
United States|Australia|Canada|United Kingdom 1
United States|China|France|Germany|India|Japan|Russian Federation|Spain|Turkey|United Kingdom 1
United States|Finland|Germany|Sweden 1

Sites per Study

Site_count Study_Count
1 281
2 20
3 9
4 4
5 6
6 6
7 2
8 3
9 2
10 1
12 1
13 1
14 1
17 1
18 1
19 1
23 1
24 1
26 1
27 1
32 1
35 1
38 1
93 1
107 1

Number of Updates

Count of Versions Count of Studies
1 49
2 58
3 72
4 35
5 19
6 26
7 23
8 19
9 8
10 7
11 5
12 4
13 9
14 1
16 3
18 1
19 1
20 3
24 1
25 1
34 1
64 1
86 2

Update History Change Type

Change Type Count_of_Changes Count_of_Studies ratio
Study Status 1571 300 5.236667
Contacts/Locations 571 249 2.293173
Study Design 380 234 1.623932
Recruitment Status 371 229 1.620087
None (earliest Version on record) 349 349 1.000000
Sponsor/Collaborators 182 135 1.348148
Eligibility 141 106 1.330189
Study Description 134 89 1.505618
Study Identification 125 90 1.388889
Outcome Measures 119 93 1.279570
Groups 95 75 1.266667
Interventions 95 75 1.266667
Conditions 91 67 1.358209
References 74 52 1.423077
Oversight 69 64 1.078125
IPDSharing 26 25 1.040000
More Information 12 4 3.000000
Results 11 11 1.000000
Results Submission Events 5 5 1.000000
Baseline Characteristics 4 3 1.333333
Documents 3 3 1.000000
Participant Flow 2 2 1.000000
Reported Adverse Events 2 2 1.000000

Enrollment Metrics

Measure Observational
Min 4.0
1st Qu 40.0
Median 128.0
Mean 582486.2
3rd Qu 600.0
Max 99999999.0

Observation Model

observational_model Study_Count
Cohort 170
Case-Only 39
Case-Control 33
Case Control 31
NA 27
Other 23
Ecologic or Community 14
Case-Crossover 7
Family-Based 3
Defined Population 1
Defined Population, Natural History 1

Time Perspective

time_perspective Study_Count
Prospective 218
Cross-Sectional 88
Retrospective 26
NA 9
Other 6
Cross-Sectional, Prospective 2

Registries

Studies by Country

Country Study_Count
United Kingdom 3
China 2
Denmark 2
Slovenia 2
Austria|Belgium|Denmark|Finland|France|Germany|Italy|Luxembourg|Norway|Poland|Slovenia|United Kingdom 1
Canada 1
Egypt 1
Israel 1
Italy 1
Kuwait 1
NA 1
Poland 1
United States 1

Sites per Study

Site_count Study_Count
1 13
2 1
3 1
6 1
15 1
24 1

Number of Updates

Count of Versions Count of Studies
1 5
2 7
3 3
4 1
5 1
14 1

Update History Change Type

Change Type Count_of_Changes Count_of_Studies ratio
Study Status 32 13 2.461539
None (earliest Version on record) 18 18 1.000000
Contacts/Locations 14 6 2.333333
Outcome Measures 10 4 2.500000
Recruitment Status 9 7 1.285714
Study Design 7 5 1.400000
Study Description 4 3 1.333333
Sponsor/Collaborators 3 3 1.000000
Study Identification 3 3 1.000000
Eligibility 2 1 2.000000
Groups 2 1 2.000000
Interventions 2 1 2.000000
Oversight 2 2 1.000000
Conditions 1 1 1.000000
Documents 1 1 1.000000
More Information 1 1 1.000000
Results 1 1 1.000000
Results Submission Events 1 1 1.000000

Enrollment Metrics

Measure Registries
Min 5.00
1st Qu 79.75
Median 141.00
Mean 29246.44
3rd Qu 2411.75
Max 500000.00

Registry Model

observational_model Study_Count
Cohort 12
Case-Control 2
Case-Crossover 1
Case-Only 1
Case Control 1
Family-Based 1

Time Perspective

time_perspective Study_Count
Prospective 14
Cross-Sectional 3
Other 1

Follow-up

target_duration Study_Count
1 Year 4
2 Years 2
3 Years 2
1 Day 1
10 Years 1
12 Months 1
16 Years 1
18 Months 1
2 Months 1
20 Years 1
22 Months 1
4 Years 1
6 Months 1